即使用戶未接受照片，相機意圖onActivityResult代碼也會保存（空白）圖像

Question

當用戶單擊十字架以不接受照片時，它將以與接受照片時相同的方式結束該意圖。它將文件保存到設備庫。但它是空白的。不應該點擊交叉表示resultCode！= RESULT_OK？是否還有一個檢查我缺少？謝謝。這是代碼。等等，我在活動結果之前保存圖像......這是一個有缺陷的系統，但它在官方的Android Developers網站上。如果有人可以提出修復建議，我會非常感激，因爲我曾經將圖像保存在onActivtyResult中，並且它在某些手機上不起作用，導致出現異常，所以我改爲這樣。

要啓動的意圖：內onActivityResult

private void dispatchTakePictureIntent() { 
       Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
       // Ensure that there's a camera activity to handle the intent 
       if (takePictureIntent.resolveActivity(getPackageManager()) != null) { 
        // Create the File where the photo should go 
        File photoFile = null; 
        try { 
         photoFile = createImageFile(); 
        } catch (IOException ex) { 
         // Error occurred while creating the File 
        } 
        // Continue only if the File was successfully created 
        if (photoFile != null) { 
         takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, 
           Uri.fromFile(photoFile)); 
         startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO); 
        } 
       } 
      } 

private File createImageFile() throws IOException { 
       // Create an image file name 
       String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); 
       String imageFileName = "JPEG_" + timeStamp + "_"; 
       File storageDir = Environment.getExternalStoragePublicDirectory(
         Environment.DIRECTORY_PICTURES); 
       File image = File.createTempFile(
        imageFileName, /* prefix */ 
        ".jpg",   /* suffix */ 
        storageDir  /* directory */ 
      ); 

       // Save a file: path for use with ACTION_VIEW intents 
       mCurrentPhotoPath = image.getAbsolutePath(); 
       ih.galleryAddPic(mCurrentPhotoPath, this.getApplicationContext()); 
       return image; 
      } 

相機意圖的情況：

else if ((requestCode == REQUEST_TAKE_PHOTO) && (resultcode == RESULT_OK)){ 
               mProfilePicPath = mCurrentPhotoPath; 
               mPortraitPhoto = ih.decodeSampledBitmapFromImagePath(mCurrentPhotoPath, 
                 GlobalConstants.PROFILE_PICTURE_RESOLUTION, 
                 GlobalConstants.PROFILE_PICTURE_RESOLUTION); 
               TextView tv = (TextView) findViewById(id.ProfilePicText); 
           tv.setText(mProfilePicPath); 
          } 
        }catch(Exception ex){ 
          Log.d("shkdghrfb", ex.toString()); 
        } 
      } 

編輯：我改變onActivityResult到這一點，但無濟於事（空白圖像仍在我的畫廊之後，刪除的值爲true）：

else if (requestCode == REQUEST_TAKE_PHOTO){ 
          if(resultcode == RESULT_OK){ 
           File f = new File(mCurrentPhotoPath); 
           mProfilePicPath = null; 
           if (f.exists()) { 
            if (f.length() != 0){ 
              mProfilePicPath = mCurrentPhotoPath; 
              mPortraitPhoto = ih.decodeSampledBitmapFromImagePath(mCurrentPhotoPath, 
                GlobalConstants.PROFILE_PICTURE_RESOLUTION, 
                GlobalConstants.PROFILE_PICTURE_RESOLUTION); 
              TextView tv = (TextView) findViewById(id.ProfilePicText); 
              tv.setText(mProfilePicPath); 
            } 
            else { 
            boolean deleted = f.delete(); 
            if (deleted == true){ 
            Log.d("camera0", "deleted"); 
            } 
            else{ 
             Log.d("camera0", "not deleted"); 
            } 
           } 
          } 
         } 
         else{ 
          File f = new File(mCurrentPhotoPath); 
          boolean deleted = f.delete(); 
          if (deleted == true){ 
          Log.d("camera", "deleted"); 
          } 
          else{ 
           Log.d("camera", "not deleted"); 
          } 
         } 
        } 
      }catch(Exception ex){ 
        Log.d("shkdghrfb", ex.toString()); 
      } 
       }catch(Exception ex){ 
         Log.d("shkdghrfb", ex.toString()); 
       } 

編輯好的我相信我需要在刪除後用MediaScannerIntent掃描SD卡的相應區域，以便顯示，因爲它看起來現在可以工作。

Answer 1

你不是用createImageFile（）創建文件嗎？ 您可以保存photoFile和結果！= RESULT_OK刪除

順便說一句，攝像頭的應用程序（甚至默認）可能會返回錯誤的結果。在日誌中檢查它。如果他們這樣做，只是不要依賴結果&檢查創建的文件的大小。如果== 0 - 刪除它